package com.bdqn.gulimall.ware.config;

import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

@Configuration
public class MyRabbitConfig {
    /**
     * 使用JSON序列化机制，进行消息转换器
     * @return
     */
    @Bean
    public MessageConverter messageConverter(){
        return new Jackson2JsonMessageConverter();
    }

    @RabbitListener(queues = "stock.release.stock.queue")
    public void handle(Message message){

    }

    /**
     * 库存服务的默认 交换机
     * @return
     */
    @Bean
    public Exchange stockEventExchange(){
        //durable 是否持久化  autoDelete 是否自动删除
        return new TopicExchange("stock-event-exchange",true,false);
    }

    /**
     * 队列
     * @return
     */
    @Bean
    public Queue stockReleaseStockQueue(){
        //exclusive 是否排他（只能有一个人连），此处多人可连，谁抢到给谁
        return new Queue("stock.release.stock.queue",true,false,false);
    }

    /**
     * 延迟队列
     * @return
     */
    @Bean
    public Queue stockDelayQueue(){
        Map<String,Object> args = new HashMap<>();
        //死性路由，性死了之后交给哪个交换机
        args.put("x-dead-letter-exchange","stock-event-exchange");
        // 性死了之后交换机要用的路由件
        args.put("x-dead-letter-routing-key","stock.release");
        // 消息过期时间
        args.put("x-message-ttl",120000);
        return new Queue("stock.delay.queue",true,false,false,args);
    }

    /**
     * 交换机与队列的绑定关系
     * @return
     */
    @Bean
    public Binding stockReleaseBinding(){
        //目的地，交换机与此目的地进行绑定
        return new Binding("stock.release.stock.queue",
                Binding.DestinationType.QUEUE,
                "stock-event-exchange",
                "stock.release.#",
                null);
    }

    /**
     * 交换机与延时队列的绑定关系
     * @return
     */
    @Bean
    public Binding stockLockedBinding(){
        return new Binding("stock.delay.queue",
                Binding.DestinationType.QUEUE,
                "stock-event-exchange",
                "stock.locked",
                null);
    }
}
